Initial import

1 files changed, 668 insertions, 0 deletions

diff --git a/arch/mips/cavium-octeon/executive/cvmx-spi.c b/arch/mips/cavium-octeon/executive/cvmx-spi.c
new file mode 100644
index 000000000..459e3b1eb
--- /dev/null
+++ b/arch/mips/cavium-octeon/executive/cvmx-spi.c
@@ -0,0 +1,668 @@
+/***********************license start***************
+ * Author: Cavium Networks
+ *
+ * Contact: support@caviumnetworks.com
+ * This file is part of the OCTEON SDK
+ *
+ * Copyright (c) 2003-2008 Cavium Networks
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
+ * NONINFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * or visit http://www.gnu.org/licenses/.
+ *
+ * This file may also be available under a different license from Cavium.
+ * Contact Cavium Networks for more information
+ ***********************license end**************************************/
+
+/*
+ *
+ * Support library for the SPI
+ */
+#include <asm/octeon/octeon.h>
+
+#include <asm/octeon/cvmx-config.h>
+
+#include <asm/octeon/cvmx-pko.h>
+#include <asm/octeon/cvmx-spi.h>
+
+#include <asm/octeon/cvmx-spxx-defs.h>
+#include <asm/octeon/cvmx-stxx-defs.h>
+#include <asm/octeon/cvmx-srxx-defs.h>
+
+#define INVOKE_CB(function_p, args...)		\
+	do {					\
+		if (function_p) {		\
+			res = function_p(args); \
+			if (res)		\
+				return res;	\
+		}				\
+	} while (0)
+
+#if CVMX_ENABLE_DEBUG_PRINTS
+static const char *modes[] =
+    { "UNKNOWN", "TX Halfplex", "Rx Halfplex", "Duplex" };
+#endif
+
+/* Default callbacks, can be overridden
+ *  using cvmx_spi_get_callbacks/cvmx_spi_set_callbacks
+ */
+static cvmx_spi_callbacks_t cvmx_spi_callbacks = {
+	.reset_cb = cvmx_spi_reset_cb,
+	.calendar_setup_cb = cvmx_spi_calendar_setup_cb,
+	.clock_detect_cb = cvmx_spi_clock_detect_cb,
+	.training_cb = cvmx_spi_training_cb,
+	.calendar_sync_cb = cvmx_spi_calendar_sync_cb,
+	.interface_up_cb = cvmx_spi_interface_up_cb
+};
+
+/**
+ * Get current SPI4 initialization callbacks
+ *
+ * @callbacks:	Pointer to the callbacks structure.to fill
+ *
+ * Returns Pointer to cvmx_spi_callbacks_t structure.
+ */
+void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t *callbacks)
+{
+	memcpy(callbacks, &cvmx_spi_callbacks, sizeof(cvmx_spi_callbacks));
+}
+
+/**
+ * Set new SPI4 initialization callbacks
+ *
+ * @new_callbacks:  Pointer to an updated callbacks structure.
+ */
+void cvmx_spi_set_callbacks(cvmx_spi_callbacks_t *new_callbacks)
+{
+	memcpy(&cvmx_spi_callbacks, new_callbacks, sizeof(cvmx_spi_callbacks));
+}
+
+/**
+ * Initialize and start the SPI interface.
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ * @timeout:   Timeout to wait for clock synchronization in seconds
+ * @num_ports: Number of SPI ports to configure
+ *
+ * Returns Zero on success, negative of failure.
+ */
+int cvmx_spi_start_interface(int interface, cvmx_spi_mode_t mode, int timeout,
+			     int num_ports)
+{
+	int res = -1;
+
+	if (!(OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)))
+		return res;
+
+	/* Callback to perform SPI4 reset */
+	INVOKE_CB(cvmx_spi_callbacks.reset_cb, interface, mode);
+
+	/* Callback to perform calendar setup */
+	INVOKE_CB(cvmx_spi_callbacks.calendar_setup_cb, interface, mode,
+		  num_ports);
+
+	/* Callback to perform clock detection */
+	INVOKE_CB(cvmx_spi_callbacks.clock_detect_cb, interface, mode, timeout);
+
+	/* Callback to perform SPI4 link training */
+	INVOKE_CB(cvmx_spi_callbacks.training_cb, interface, mode, timeout);
+
+	/* Callback to perform calendar sync */
+	INVOKE_CB(cvmx_spi_callbacks.calendar_sync_cb, interface, mode,
+		  timeout);
+
+	/* Callback to handle interface coming up */
+	INVOKE_CB(cvmx_spi_callbacks.interface_up_cb, interface, mode);
+
+	return res;
+}
+
+/**
+ * This routine restarts the SPI interface after it has lost synchronization
+ * with its correspondent system.
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ * @timeout:   Timeout to wait for clock synchronization in seconds
+ *
+ * Returns Zero on success, negative of failure.
+ */
+int cvmx_spi_restart_interface(int interface, cvmx_spi_mode_t mode, int timeout)
+{
+	int res = -1;
+
+	if (!(OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)))
+		return res;
+
+	cvmx_dprintf("SPI%d: Restart %s\n", interface, modes[mode]);
+
+	/* Callback to perform SPI4 reset */
+	INVOKE_CB(cvmx_spi_callbacks.reset_cb, interface, mode);
+
+	/* NOTE: Calendar setup is not performed during restart */
+	/*	 Refer to cvmx_spi_start_interface() for the full sequence */
+
+	/* Callback to perform clock detection */
+	INVOKE_CB(cvmx_spi_callbacks.clock_detect_cb, interface, mode, timeout);
+
+	/* Callback to perform SPI4 link training */
+	INVOKE_CB(cvmx_spi_callbacks.training_cb, interface, mode, timeout);
+
+	/* Callback to perform calendar sync */
+	INVOKE_CB(cvmx_spi_callbacks.calendar_sync_cb, interface, mode,
+		  timeout);
+
+	/* Callback to handle interface coming up */
+	INVOKE_CB(cvmx_spi_callbacks.interface_up_cb, interface, mode);
+
+	return res;
+}
+EXPORT_SYMBOL_GPL(cvmx_spi_restart_interface);
+
+/**
+ * Callback to perform SPI4 reset
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ *
+ * Returns Zero on success, non-zero error code on failure (will cause
+ * SPI initialization to abort)
+ */
+int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode)
+{
+	union cvmx_spxx_dbg_deskew_ctl spxx_dbg_deskew_ctl;
+	union cvmx_spxx_clk_ctl spxx_clk_ctl;
+	union cvmx_spxx_bist_stat spxx_bist_stat;
+	union cvmx_spxx_int_msk spxx_int_msk;
+	union cvmx_stxx_int_msk stxx_int_msk;
+	union cvmx_spxx_trn4_ctl spxx_trn4_ctl;
+	int index;
+	uint64_t MS = cvmx_sysinfo_get()->cpu_clock_hz / 1000;
+
+	/* Disable SPI error events while we run BIST */
+	spxx_int_msk.u64 = cvmx_read_csr(CVMX_SPXX_INT_MSK(interface));
+	cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
+	stxx_int_msk.u64 = cvmx_read_csr(CVMX_STXX_INT_MSK(interface));
+	cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
+
+	/* Run BIST in the SPI interface */
+	cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), 0);
+	cvmx_write_csr(CVMX_STXX_COM_CTL(interface), 0);
+	spxx_clk_ctl.u64 = 0;
+	spxx_clk_ctl.s.runbist = 1;
+	cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
+	cvmx_wait(10 * MS);
+	spxx_bist_stat.u64 = cvmx_read_csr(CVMX_SPXX_BIST_STAT(interface));
+	if (spxx_bist_stat.s.stat0)
+		cvmx_dprintf
+		    ("ERROR SPI%d: BIST failed on receive datapath FIFO\n",
+		     interface);
+	if (spxx_bist_stat.s.stat1)
+		cvmx_dprintf("ERROR SPI%d: BIST failed on RX calendar table\n",
+			     interface);
+	if (spxx_bist_stat.s.stat2)
+		cvmx_dprintf("ERROR SPI%d: BIST failed on TX calendar table\n",
+			     interface);
+
+	/* Clear the calendar table after BIST to fix parity errors */
+	for (index = 0; index < 32; index++) {
+		union cvmx_srxx_spi4_calx srxx_spi4_calx;
+		union cvmx_stxx_spi4_calx stxx_spi4_calx;
+
+		srxx_spi4_calx.u64 = 0;
+		srxx_spi4_calx.s.oddpar = 1;
+		cvmx_write_csr(CVMX_SRXX_SPI4_CALX(index, interface),
+			       srxx_spi4_calx.u64);
+
+		stxx_spi4_calx.u64 = 0;
+		stxx_spi4_calx.s.oddpar = 1;
+		cvmx_write_csr(CVMX_STXX_SPI4_CALX(index, interface),
+			       stxx_spi4_calx.u64);
+	}
+
+	/* Re enable reporting of error interrupts */
+	cvmx_write_csr(CVMX_SPXX_INT_REG(interface),
+		       cvmx_read_csr(CVMX_SPXX_INT_REG(interface)));
+	cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), spxx_int_msk.u64);
+	cvmx_write_csr(CVMX_STXX_INT_REG(interface),
+		       cvmx_read_csr(CVMX_STXX_INT_REG(interface)));
+	cvmx_write_csr(CVMX_STXX_INT_MSK(interface), stxx_int_msk.u64);
+
+	/* Setup the CLKDLY right in the middle */
+	spxx_clk_ctl.u64 = 0;
+	spxx_clk_ctl.s.seetrn = 0;
+	spxx_clk_ctl.s.clkdly = 0x10;
+	spxx_clk_ctl.s.runbist = 0;
+	spxx_clk_ctl.s.statdrv = 0;
+	/* This should always be on the opposite edge as statdrv */
+	spxx_clk_ctl.s.statrcv = 1;
+	spxx_clk_ctl.s.sndtrn = 0;
+	spxx_clk_ctl.s.drptrn = 0;
+	spxx_clk_ctl.s.rcvtrn = 0;
+	spxx_clk_ctl.s.srxdlck = 0;
+	cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
+	cvmx_wait(100 * MS);
+
+	/* Reset SRX0 DLL */
+	spxx_clk_ctl.s.srxdlck = 1;
+	cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
+
+	/* Waiting for Inf0 Spi4 RX DLL to lock */
+	cvmx_wait(100 * MS);
+
+	/* Enable dynamic alignment */
+	spxx_trn4_ctl.s.trntest = 0;
+	spxx_trn4_ctl.s.jitter = 1;
+	spxx_trn4_ctl.s.clr_boot = 1;
+	spxx_trn4_ctl.s.set_boot = 0;
+	if (OCTEON_IS_MODEL(OCTEON_CN58XX))
+		spxx_trn4_ctl.s.maxdist = 3;
+	else
+		spxx_trn4_ctl.s.maxdist = 8;
+	spxx_trn4_ctl.s.macro_en = 1;
+	spxx_trn4_ctl.s.mux_en = 1;
+	cvmx_write_csr(CVMX_SPXX_TRN4_CTL(interface), spxx_trn4_ctl.u64);
+
+	spxx_dbg_deskew_ctl.u64 = 0;
+	cvmx_write_csr(CVMX_SPXX_DBG_DESKEW_CTL(interface),
+		       spxx_dbg_deskew_ctl.u64);
+
+	return 0;
+}
+
+/**
+ * Callback to setup calendar and miscellaneous settings before clock detection
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ * @num_ports: Number of ports to configure on SPI
+ *
+ * Returns Zero on success, non-zero error code on failure (will cause
+ * SPI initialization to abort)
+ */
+int cvmx_spi_calendar_setup_cb(int interface, cvmx_spi_mode_t mode,
+			       int num_ports)
+{
+	int port;
+	int index;
+	if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
+		union cvmx_srxx_com_ctl srxx_com_ctl;
+		union cvmx_srxx_spi4_stat srxx_spi4_stat;
+
+		/* SRX0 number of Ports */
+		srxx_com_ctl.u64 = 0;
+		srxx_com_ctl.s.prts = num_ports - 1;
+		srxx_com_ctl.s.st_en = 0;
+		srxx_com_ctl.s.inf_en = 0;
+		cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), srxx_com_ctl.u64);
+
+		/* SRX0 Calendar Table. This round robbins through all ports */
+		port = 0;
+		index = 0;
+		while (port < num_ports) {
+			union cvmx_srxx_spi4_calx srxx_spi4_calx;
+			srxx_spi4_calx.u64 = 0;
+			srxx_spi4_calx.s.prt0 = port++;
+			srxx_spi4_calx.s.prt1 = port++;
+			srxx_spi4_calx.s.prt2 = port++;
+			srxx_spi4_calx.s.prt3 = port++;
+			srxx_spi4_calx.s.oddpar =
+			    ~(cvmx_dpop(srxx_spi4_calx.u64) & 1);
+			cvmx_write_csr(CVMX_SRXX_SPI4_CALX(index, interface),
+				       srxx_spi4_calx.u64);
+			index++;
+		}
+		srxx_spi4_stat.u64 = 0;
+		srxx_spi4_stat.s.len = num_ports;
+		srxx_spi4_stat.s.m = 1;
+		cvmx_write_csr(CVMX_SRXX_SPI4_STAT(interface),
+			       srxx_spi4_stat.u64);
+	}
+
+	if (mode & CVMX_SPI_MODE_TX_HALFPLEX) {
+		union cvmx_stxx_arb_ctl stxx_arb_ctl;
+		union cvmx_gmxx_tx_spi_max gmxx_tx_spi_max;
+		union cvmx_gmxx_tx_spi_thresh gmxx_tx_spi_thresh;
+		union cvmx_gmxx_tx_spi_ctl gmxx_tx_spi_ctl;
+		union cvmx_stxx_spi4_stat stxx_spi4_stat;
+		union cvmx_stxx_spi4_dat stxx_spi4_dat;
+
+		/* STX0 Config */
+		stxx_arb_ctl.u64 = 0;
+		stxx_arb_ctl.s.igntpa = 0;
+		stxx_arb_ctl.s.mintrn = 0;
+		cvmx_write_csr(CVMX_STXX_ARB_CTL(interface), stxx_arb_ctl.u64);
+
+		gmxx_tx_spi_max.u64 = 0;
+		gmxx_tx_spi_max.s.max1 = 8;
+		gmxx_tx_spi_max.s.max2 = 4;
+		gmxx_tx_spi_max.s.slice = 0;
+		cvmx_write_csr(CVMX_GMXX_TX_SPI_MAX(interface),
+			       gmxx_tx_spi_max.u64);
+
+		gmxx_tx_spi_thresh.u64 = 0;
+		gmxx_tx_spi_thresh.s.thresh = 4;
+		cvmx_write_csr(CVMX_GMXX_TX_SPI_THRESH(interface),
+			       gmxx_tx_spi_thresh.u64);
+
+		gmxx_tx_spi_ctl.u64 = 0;
+		gmxx_tx_spi_ctl.s.tpa_clr = 0;
+		gmxx_tx_spi_ctl.s.cont_pkt = 0;
+		cvmx_write_csr(CVMX_GMXX_TX_SPI_CTL(interface),
+			       gmxx_tx_spi_ctl.u64);
+
+		/* STX0 Training Control */
+		stxx_spi4_dat.u64 = 0;
+		/*Minimum needed by dynamic alignment */
+		stxx_spi4_dat.s.alpha = 32;
+		stxx_spi4_dat.s.max_t = 0xFFFF; /*Minimum interval is 0x20 */
+		cvmx_write_csr(CVMX_STXX_SPI4_DAT(interface),
+			       stxx_spi4_dat.u64);
+
+		/* STX0 Calendar Table. This round robbins through all ports */
+		port = 0;
+		index = 0;
+		while (port < num_ports) {
+			union cvmx_stxx_spi4_calx stxx_spi4_calx;
+			stxx_spi4_calx.u64 = 0;
+			stxx_spi4_calx.s.prt0 = port++;
+			stxx_spi4_calx.s.prt1 = port++;
+			stxx_spi4_calx.s.prt2 = port++;
+			stxx_spi4_calx.s.prt3 = port++;
+			stxx_spi4_calx.s.oddpar =
+			    ~(cvmx_dpop(stxx_spi4_calx.u64) & 1);
+			cvmx_write_csr(CVMX_STXX_SPI4_CALX(index, interface),
+				       stxx_spi4_calx.u64);
+			index++;
+		}
+		stxx_spi4_stat.u64 = 0;
+		stxx_spi4_stat.s.len = num_ports;
+		stxx_spi4_stat.s.m = 1;
+		cvmx_write_csr(CVMX_STXX_SPI4_STAT(interface),
+			       stxx_spi4_stat.u64);
+	}
+
+	return 0;
+}
+
+/**
+ * Callback to perform clock detection
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ * @timeout:   Timeout to wait for clock synchronization in seconds
+ *
+ * Returns Zero on success, non-zero error code on failure (will cause
+ * SPI initialization to abort)
+ */
+int cvmx_spi_clock_detect_cb(int interface, cvmx_spi_mode_t mode, int timeout)
+{
+	int clock_transitions;
+	union cvmx_spxx_clk_stat stat;
+	uint64_t timeout_time;
+	uint64_t MS = cvmx_sysinfo_get()->cpu_clock_hz / 1000;
+
+	/*
+	 * Regardless of operating mode, both Tx and Rx clocks must be
+	 * present for the SPI interface to operate.
+	 */
+	cvmx_dprintf("SPI%d: Waiting to see TsClk...\n", interface);
+	timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
+	/*
+	 * Require 100 clock transitions in order to avoid any noise
+	 * in the beginning.
+	 */
+	clock_transitions = 100;
+	do {
+		stat.u64 = cvmx_read_csr(CVMX_SPXX_CLK_STAT(interface));
+		if (stat.s.s4clk0 && stat.s.s4clk1 && clock_transitions) {
+			/*
+			 * We've seen a clock transition, so decrement
+			 * the number we still need.
+			 */
+			clock_transitions--;
+			cvmx_write_csr(CVMX_SPXX_CLK_STAT(interface), stat.u64);
+			stat.s.s4clk0 = 0;
+			stat.s.s4clk1 = 0;
+		}
+		if (cvmx_get_cycle() > timeout_time) {
+			cvmx_dprintf("SPI%d: Timeout\n", interface);
+			return -1;
+		}
+	} while (stat.s.s4clk0 == 0 || stat.s.s4clk1 == 0);
+
+	cvmx_dprintf("SPI%d: Waiting to see RsClk...\n", interface);
+	timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
+	/*
+	 * Require 100 clock transitions in order to avoid any noise in the
+	 * beginning.
+	 */
+	clock_transitions = 100;
+	do {
+		stat.u64 = cvmx_read_csr(CVMX_SPXX_CLK_STAT(interface));
+		if (stat.s.d4clk0 && stat.s.d4clk1 && clock_transitions) {
+			/*
+			 * We've seen a clock transition, so decrement
+			 * the number we still need
+			 */
+			clock_transitions--;
+			cvmx_write_csr(CVMX_SPXX_CLK_STAT(interface), stat.u64);
+			stat.s.d4clk0 = 0;
+			stat.s.d4clk1 = 0;
+		}
+		if (cvmx_get_cycle() > timeout_time) {
+			cvmx_dprintf("SPI%d: Timeout\n", interface);
+			return -1;
+		}
+	} while (stat.s.d4clk0 == 0 || stat.s.d4clk1 == 0);
+
+	return 0;
+}
+
+/**
+ * Callback to perform link training
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ * @timeout:   Timeout to wait for link to be trained (in seconds)
+ *
+ * Returns Zero on success, non-zero error code on failure (will cause
+ * SPI initialization to abort)
+ */
+int cvmx_spi_training_cb(int interface, cvmx_spi_mode_t mode, int timeout)
+{
+	union cvmx_spxx_trn4_ctl spxx_trn4_ctl;
+	union cvmx_spxx_clk_stat stat;
+	uint64_t MS = cvmx_sysinfo_get()->cpu_clock_hz / 1000;
+	uint64_t timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
+	int rx_training_needed;
+
+	/* SRX0 & STX0 Inf0 Links are configured - begin training */
+	union cvmx_spxx_clk_ctl spxx_clk_ctl;
+	spxx_clk_ctl.u64 = 0;
+	spxx_clk_ctl.s.seetrn = 0;
+	spxx_clk_ctl.s.clkdly = 0x10;
+	spxx_clk_ctl.s.runbist = 0;
+	spxx_clk_ctl.s.statdrv = 0;
+	/* This should always be on the opposite edge as statdrv */
+	spxx_clk_ctl.s.statrcv = 1;
+	spxx_clk_ctl.s.sndtrn = 1;
+	spxx_clk_ctl.s.drptrn = 1;
+	spxx_clk_ctl.s.rcvtrn = 1;
+	spxx_clk_ctl.s.srxdlck = 1;
+	cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
+	cvmx_wait(1000 * MS);
+
+	/* SRX0 clear the boot bit */
+	spxx_trn4_ctl.u64 = cvmx_read_csr(CVMX_SPXX_TRN4_CTL(interface));
+	spxx_trn4_ctl.s.clr_boot = 1;
+	cvmx_write_csr(CVMX_SPXX_TRN4_CTL(interface), spxx_trn4_ctl.u64);
+
+	/* Wait for the training sequence to complete */
+	cvmx_dprintf("SPI%d: Waiting for training\n", interface);
+	cvmx_wait(1000 * MS);
+	/* Wait a really long time here */
+	timeout_time = cvmx_get_cycle() + 1000ull * MS * 600;
+	/*
+	 * The HRM says we must wait for 34 + 16 * MAXDIST training sequences.
+	 * We'll be pessimistic and wait for a lot more.
+	 */
+	rx_training_needed = 500;
+	do {
+		stat.u64 = cvmx_read_csr(CVMX_SPXX_CLK_STAT(interface));
+		if (stat.s.srxtrn && rx_training_needed) {
+			rx_training_needed--;
+			cvmx_write_csr(CVMX_SPXX_CLK_STAT(interface), stat.u64);
+			stat.s.srxtrn = 0;
+		}
+		if (cvmx_get_cycle() > timeout_time) {
+			cvmx_dprintf("SPI%d: Timeout\n", interface);
+			return -1;
+		}
+	} while (stat.s.srxtrn == 0);
+
+	return 0;
+}
+
+/**
+ * Callback to perform calendar data synchronization
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ * @timeout:   Timeout to wait for calendar data in seconds
+ *
+ * Returns Zero on success, non-zero error code on failure (will cause
+ * SPI initialization to abort)
+ */
+int cvmx_spi_calendar_sync_cb(int interface, cvmx_spi_mode_t mode, int timeout)
+{
+	uint64_t MS = cvmx_sysinfo_get()->cpu_clock_hz / 1000;
+	if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
+		/* SRX0 interface should be good, send calendar data */
+		union cvmx_srxx_com_ctl srxx_com_ctl;
+		cvmx_dprintf
+		    ("SPI%d: Rx is synchronized, start sending calendar data\n",
+		     interface);
+		srxx_com_ctl.u64 = cvmx_read_csr(CVMX_SRXX_COM_CTL(interface));
+		srxx_com_ctl.s.inf_en = 1;
+		srxx_com_ctl.s.st_en = 1;
+		cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), srxx_com_ctl.u64);
+	}
+
+	if (mode & CVMX_SPI_MODE_TX_HALFPLEX) {
+		/* STX0 has achieved sync */
+		/* The corespondant board should be sending calendar data */
+		/* Enable the STX0 STAT receiver. */
+		union cvmx_spxx_clk_stat stat;
+		uint64_t timeout_time;
+		union cvmx_stxx_com_ctl stxx_com_ctl;
+		stxx_com_ctl.u64 = 0;
+		stxx_com_ctl.s.st_en = 1;
+		cvmx_write_csr(CVMX_STXX_COM_CTL(interface), stxx_com_ctl.u64);
+
+		/* Waiting for calendar sync on STX0 STAT */
+		cvmx_dprintf("SPI%d: Waiting to sync on STX[%d] STAT\n",
+			     interface, interface);
+		timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
+		/* SPX0_CLK_STAT - SPX0_CLK_STAT[STXCAL] should be 1 (bit10) */
+		do {
+			stat.u64 = cvmx_read_csr(CVMX_SPXX_CLK_STAT(interface));
+			if (cvmx_get_cycle() > timeout_time) {
+				cvmx_dprintf("SPI%d: Timeout\n", interface);
+				return -1;
+			}
+		} while (stat.s.stxcal == 0);
+	}
+
+	return 0;
+}
+
+/**
+ * Callback to handle interface up
+ *
+ * @interface: The identifier of the packet interface to configure and
+ *		    use as a SPI interface.
+ * @mode:      The operating mode for the SPI interface. The interface
+ *		    can operate as a full duplex (both Tx and Rx data paths
+ *		    active) or as a halfplex (either the Tx data path is
+ *		    active or the Rx data path is active, but not both).
+ *
+ * Returns Zero on success, non-zero error code on failure (will cause
+ * SPI initialization to abort)
+ */
+int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode)
+{
+	union cvmx_gmxx_rxx_frm_min gmxx_rxx_frm_min;
+	union cvmx_gmxx_rxx_frm_max gmxx_rxx_frm_max;
+	union cvmx_gmxx_rxx_jabber gmxx_rxx_jabber;
+
+	if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
+		union cvmx_srxx_com_ctl srxx_com_ctl;
+		srxx_com_ctl.u64 = cvmx_read_csr(CVMX_SRXX_COM_CTL(interface));
+		srxx_com_ctl.s.inf_en = 1;
+		cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), srxx_com_ctl.u64);
+		cvmx_dprintf("SPI%d: Rx is now up\n", interface);
+	}
+
+	if (mode & CVMX_SPI_MODE_TX_HALFPLEX) {
+		union cvmx_stxx_com_ctl stxx_com_ctl;
+		stxx_com_ctl.u64 = cvmx_read_csr(CVMX_STXX_COM_CTL(interface));
+		stxx_com_ctl.s.inf_en = 1;
+		cvmx_write_csr(CVMX_STXX_COM_CTL(interface), stxx_com_ctl.u64);
+		cvmx_dprintf("SPI%d: Tx is now up\n", interface);
+	}
+
+	gmxx_rxx_frm_min.u64 = 0;
+	gmxx_rxx_frm_min.s.len = 64;
+	cvmx_write_csr(CVMX_GMXX_RXX_FRM_MIN(0, interface),
+		       gmxx_rxx_frm_min.u64);
+	gmxx_rxx_frm_max.u64 = 0;
+	gmxx_rxx_frm_max.s.len = 64 * 1024 - 4;
+	cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(0, interface),
+		       gmxx_rxx_frm_max.u64);
+	gmxx_rxx_jabber.u64 = 0;
+	gmxx_rxx_jabber.s.cnt = 64 * 1024 - 4;
+	cvmx_write_csr(CVMX_GMXX_RXX_JABBER(0, interface), gmxx_rxx_jabber.u64);
+
+	return 0;
+}